Improvement in the manufacture of wrought-iron columns



@sind @titille vGllORGl. HALSTEAD, OF BUFFALO, NEW YORI.

Letters Patent No. 91,125, dated June 8, 1869.

IMPROVEMENT IN THE MANUFACTURE OF WROUG-HT-IRQN COLUMNS.

The Schedule referred to in these Letters Patent and making part of thesame.

To ull whom it may concern Be it known that I, GEORGE HALSTEAD, of thecity of' Buialo, county of Erie, and State of New York, have invented acertain Improved Wrought- Iron Column; and I do hereby declare that thefollowing is a full, clear, and exact description thereof', referencebeing had to the accompanying drawings, making a part of thisspeciiication.

The nature of my invention consist's-in constructing cylindricalcolumns, by the combination of beaded segmental plates, riveted togetheron longitudinal lines, with flush joints, formed by rebating one edge ofeach plate to receive the lapping edge of the adjacent plate, the jointbeing. covered'by a separate bead through which the joint-rivets pass.

In the accompanying 4drawings- Figure 1 is a perspective view of my saidimproved column.

Figure 2 is a cross-section thereof. l

Like letters refer to like parts in both figures.

A represents the segmental plates, in length equal to the requiredlength of the column, and curved in cross-section to a radius coincidentto that of the column, their width, less the required lap for thejoints, being an even divisor of the circumference of the column, sothat when two, three, or more plates, as the case may be, are broughttogether, they will form a complete cylinder.

The number of the plates above two will be governed by the size of thecolumn and the convenience ofzrolling. A

One edge of each plate is formed with a rebate, as shown at l), toreceive the lapping edge of the plate, and makes a flush joint, theplates being secured together by radial rivet-s c, passing through bothof the lapped edges.

A longitudinal bead, (l, is applied to and covers the joint, the rivetsc passing through the bead, with countersunk heads upon the outside.

The beads may be half-round, square, or Gothic, in cross-section, andadditional beads, e, may be formed upon the plates where they arerolled, so that a tine, finish may be given to the column.

These beads will also add strength and stiffness to the column.

The plates may be rolled to the required curvation in the iirstinstance, or they may be made flat, and subsequently curved, as may bepreferred.

Having thus described my invention,

What I claim, and desire to secure by Letters Patent, is

The improved column or shaft herein described and shown, composed of thebeaded and rebated segmental plates A and bead-like battens d, joinedone to the other, and united by rivets or bolts, in the manner setforth.

GEORGE HALSTEAD.

Witnesses W. H. FOEBUsH, V. H. BECKER.

